quack

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Related to quacks: quacksalver, Quack medicine

if it looks like a duck and walks like a duck, it is a duck

If something has all the characteristics of a thing, it is probably that thing, regardless of what it is called or presented as. There are many variations of the expression, and it is often shortened to the first part of the phrase. They say it's not a tax, but if it looks like a duck and walks like a duck, it is a duck.
See also: and, duck, if, like, look, walk

quack

n. a fraudulent physician; a derogatory term for a physician. I won’t go back to that quack ever again!
References in periodicals archive ?
Talking to The Express Tribune, he agreed that many gyneacology centres of quacks had become functional again due to the alleged involvement of some people from the medical community.
DC said that quacks were playing with the lives of the public and
He demanded of the federal and provincial authorities concerned to educate people about the menace of quackery, increase the strength of qualified doctors in rural and urban slums and launch a crackdown on quacks to eliminate this menace from the society.
Some in-service physicians and surgeons are also encouraging the quacks by allowing them to display their names outside their so-called clinics and are getting some money from them on monthly basis.
In our rural areas, literacy rate is very low, most of the population is very poor and people have a trend of consulting quacks for their ailments instead of visiting medical health facilities.
A team of four members from the antiquackery committee of CDMO visited the area where the quacks operated from on Monday and issued notices to them.
Quacks aggressively promote their products and cures.
Poverty and illness force the villagers to the doors of "Jholachaap Doctors", quacks.
There have been numerous allusions to quacks and charlatans in the literature [6; 7]
Elaborating, he says: "These quacks can be divided into three categories: (a) almost uneducated, untrained people, who spend some months with a doctor or a quack, and then open their own clinics; (b) homoeopaths and hakeems, practising allopathy; and (c) paramedics, who are allowed limited medication tasks under the law.
IT is one of those scientific pearls of wisdom that tend to be quoted after several pints: a duck's quack does not produce an echo, and no one knows why.
A lively exhibition tracing the history of the colorful purveyors of patent and quack medicines over the past four centuries, "Quack, Quack, Quack: The Sellers of Nostrums in Prints, Posters, Ephemera & Books" contains 75 works ranging from humorous caricatures of itinerant quacks, flamboyant advertising posters, and promotional pamphlets for rival panaceas (each supported by extravagant claims of efficacy), to prints that document the first governmental attempts to curtail the more flagrant abuses.
If it looks like a duck, quacks like a duck, and walks like a duck, it's a duck.
Professor Cox said: ``Aduck quacks rather quietly, so the sound coming backis at a low level and might not be heard.
Professor Cox said: 'A duck quacks rather quietly, so the sound coming back is at a low level and might not be heard.